Problem with absorption in corona 4

[Alexandr.m]

Hi everyone! I have a problem with absorption in corona 4. I have attached screenshots in corona 3 and 4. In corona 4 liquids with absorption are not rendering correctly, when it's geometry is in or near the glass. If I have a little distance between a glass and liquid geometry, I can see the absoption. May be there is a check box in render setings or it is a bug?

[romullus]

Hi,
This isn't a bug. Intersecting refractive medium rendering was greatly improved in Corona 4, but that means that correct orientation of mesh normals are much more important now. Check the glass and liquid normals and make sure that they're oriented correctly.

https://forum.corona-renderer.com/index.php?topic=25043.msg150543#msg150543

[Alexandr.m]

 Thank you for so fast reply. I checked all what you said and found the problem root. Liquid may render good when it detached from the glass object. When I have attached liquid to glass object and assigned multisub material, liquid lost it's absorption effect in or near glass.

[VASLAVO]

sorry but i have a question if i attach a liquid to a glass there is no way to mantain the absortion correct? the liquid always has to be dettached?
facing the same issue here witha flower vase

[romullus]

It might be possible to do with liquid attached to the glass, but you must make sure that glass and liquid is realized within single material with multiple multimaps and material IDs. Any kind of blending of different materials will most likely give the wrong result. It's much easier to set-up when liquid and glass are separate objects with separate materials.